Technology break through! 9mm super drivers with neodymium magnets combined with custom fit ear gels provide the ultimate performance. This stereo earphone has good looks as well! The In line volume control allows easy and instant adjustment of the sound level.

These headphones sound great and do an excellent job of screening outside noise as well. I have had some trouble keeping them in my ears while exercising, but the headphones come with a variety of ear-bud covers in a variety of materials. Maybe I simply haven't found the right one for exercise.